Convert curve to adjustable Volume

Hello

i am relatively new to rhino still.

For school we designed a Roof which has a wave form to its z-axis. I have a clean and closed curve exported from a 2d plan. My question is now how I can create a volume (or surface) which has a set boundary but can later be transformed within it s surface (the roof gets thicker towards the middle but stays thin at the borders.

I can create a volume which has several triangular faces which fulfill the general shape, but my goal would be to create a volume which is curved and “one” piece, where all the borders have been smoothed out.
I know that sub-d volumes have these properties but I don’t quite understand how I can get a sub-d surface/volume from my curve.

I hope my question makes some sense.

Attached you can find the curve which is already adjusted to its height requirements.
Roof_Curve.3dm (2.7 MB)

Hi Jonas - do you mean something like this?

image

Roof_Curve_Maybe.3dm (286.9 KB)

-Pascal

Hi there,
thanks for the fast response!

more the other way round. Like the attached picture-

Hello - I am not sure I see what you are getting at - a void in an area or volume?
image

Roof_Curve_Maybe2.3dm (171.4 KB)

-Pascal

Ah sorry no, I just put the red square as a reference to wehre the Ground is… my image was a bit hard to read… :smiley:

Like this but as a volume which has surfaces which can be manipulated by adding points, would be the goal


Like so?

Roof_CurveMaybe3.3dm (247.1 KB)

image

-Pascal

That looks promising! Thanks!

How would I do that? :slight_smile:

Here’s what I did, if I remember right - flattened the curve to be planar. Then PlanarSrf, then QuadRemesh, then ToSubD (or SubD output on Quadremesh) then exctruded the subd a short distance using the Gumball.

-Pascal

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Hi that all worked great thanks so much!

One more question…
If I Gumball a point on the sub-d after I already extruded it to be volumetric.
It always morphes the whole model, so the under and top side of the roof (see picture) is there a way so I can move the points on the top without disturbing the underside of the volume?

Thanks so much for your help!


Hi Jonas -

Yes, you need to make sure to only select a point on the top.
It’s hard to tell from your picture, but there doesn’t appear to be any thickness to that object. Can you post the 3dm file?
-wim

Hi, sure.
It is quite “thin” but it should be extruded by about 10cm. :slight_smile:

Roof_SubD.3dm (802.2 KB)

Hi Jonas -

It’s a single surface, so that would be infinitely thin. You need a top and a bottom surface if you want one side to be modified while the other side stays in place.

I’m not sure how Pascal created the closed SubD object and your object isn’t planar. If you go back a step, before extruding the SubD object, you can place a copy of that surface 1 dm above the original. Then run SubDLoft and select the boundary of both and use the Join option to create a closed object.

-wim

1 Like